As the cryptocurrency market capitalization approaches $2.95 trillion in early 2026, the emergence of fault-tolerant quantum computing places the cryptographic pillars of the digital economy at risk, EBSCO reported.
Cryptocurrency operates as a medium of exchange and digital means of payment generated and stored electronically on a blockchain system. These systems employ cryptographic techniques to verify the transfer of funds and an algorithm to control the formation of monetary units. Transactions within these networks are assembled in groups called blocks, which are organized in a chronological sequence known as a blockchain.
Blocks are added to the chain through a mathematical process that makes it very difficult for an individual user to seize the blockchain. Progresses made in quantum computing serve for long-term security considerations regarding the threats facing cryptographic algorithms currently used in blockchain applications.
Current risk models overlook the distinct economic asymmetry inherent to blockchain assets—specifically comparing the constant computational cost of cracking cryptography against variable, high-stakes financial rewards on-chain—even though Shor’s algorithm introduces a systemic risk to the elliptic curve primitives protecting Web3.
To address this gap, researchers introduced the Quantum Economic Risk Assessment (QERA) framework. The QERA quantitative model evaluates and prioritizes blockchain security flaws based on how much extractable value compares to the cost of quantum computing.
By mapping out the Ethereum and Bitcoin ecosystems component by component, the methodology reveals that a rational quantum attacker will bypass consensus-level attacks—demonstrated to be economically irrational given a $4.65 trillion cost—and instead focus on valuable, single-key assets.
The findings identify Satoshi-era P2PK addresses with a ratio of 24,606, single-admin DeFi protocols at 8,517, and pairing-based ZK rollups at 3,155 as the most urgent targets for post-quantum migration. In short, QERA equips protocol creators and institutional leaders with a strict, adversary-focused guide for executing evidence-based cryptographic upgrades amid developing quantum hazards.
